Iv got a screen printing rig already, so was just wondering if I could use some special etch resistant ink?
If you can find out what kind of ink sharpies use, you could potentially use that (its used for touch-ups on trace work on the PCB before etching; they also make an "industrial" version of the ink that is even stronger, but you probably don't want that).
Or - maybe some kind of acrylic-based ink...? If such a thing exists...
